Pith Number

pith:WN4UVZAR

pith:2012:WN4UVZARQ3GE5HTDFV6O3DQD6F

not attested not anchored not stored refs pending

Double-peaked Narrow-Line Signatures of Dual Supermassive Black Holes in Galaxy Merger Simulations

Abraham Loeb, Laura Blecha, Ramesh Narayan

arxiv:1201.1904 v2 · 2012-01-09 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WN4UVZARQ3GE5HTDFV6O3DQD6F}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:58:53.782944Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3794ae41186cc4e9e632d7ced8e03f1478503b8f91a4e87d460d8fea8827d06

Aliases

arxiv: 1201.1904 · arxiv_version: 1201.1904v2 · doi: 10.48550/arxiv.1201.1904 · pith_short_12: WN4UVZARQ3GE · pith_short_16: WN4UVZARQ3GE5HTD · pith_short_8: WN4UVZAR

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/WN4UVZARQ3GE5HTDFV6O3DQD6F \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b3794ae41186cc4e9e632d7ced8e03f1478503b8f91a4e87d460d8fea8827d06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27b49220d3302834a9e2bad3aa22123799086aef8b4529957b3448fdc088faa2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-01-09T21:00:01Z",
    "title_canon_sha256": "0dcfdb7470d095170fe7a06f58a75a4800121d717310ebfc4cee344febfd70c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.1904",
    "kind": "arxiv",
    "version": 2
  }
}